题解 | 合并区间

# class Interval:
#     def __init__(self, a=0, b=0):
#         self.start = a
#         self.end = b
#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 
# @param intervals Interval类一维数组 
# @return Interval类一维数组
#
class Solution:
    def merge(self , intervals: List[Interval]) -> List[Interval]:
        # write code here
        intervals.sort(key = lambda x:x.start)
        n = len(intervals)
        nintervals = []
        for i in range(n):
            if i < n-1:
                if intervals[i].end >= intervals[i+1].end:
                        intervals[i+1].start = intervals[i].start
                        intervals[i+1].end = intervals[i].end
                elif intervals[i].end >= intervals[i+1].start:
                    intervals[i+1].start = intervals[i].start
                else:
                        nintervals.append(intervals[i])
            else:
                nintervals.append(intervals[i])
        return nintervals